I've become addicted to this bizarre story, here for my daily update.
As far as what will he do in the future- I assume he'll keep it up, under false names (or perhaps even his own), and keep getting caught. Ideally, there would be some repository of known cheaters for race directors to access, even dinky little 5k's. But, even if there was (is?) such a thing, the list of possible aliases is long, and for many races you can show up and pay cash day of the race. If the guys hasn't stopped now, I doubt he ever will. I have a feeling that after this cools down, this thread will pop up every few months with a new sighting, suspicious result, missing pictures, and perhaps even a few episodes of being caught red-anded. What a strange and sorry story.